KOMAI Oil Filter – Filtration Precision 50 Times Finer Than a Human Hair

The “extended oil change” technology is increasingly being used in trucks. During engine operation, the engine oil not only lubricates, protects, and cleans but also accumulates countless sludge particles, metal debris, and external contaminants. Since the oil itself cannot isolate these impurities, it relies entirely on the oil filter to remove them.

Therefore, the “extended oil change” technology not only demands higher-grade engine oil but also places exceptionally strict requirements on the oil filter.

Trucks require a large amount of engine oil, with high oil pressure and flow rate. The oil filter must balance both oil flow and filtration precision — yet these two factors often conflict with each other.

To ensure high filtration precision, the flow rate must be reduced; however, if flow rate is prioritized, the filtration precision can no longer be guaranteed.

To strike a balance between filtration precision and oil flow — ensuring both extended oil change intervals and longer engine life — our truck engines are equipped with one or more oil filters.

By combining coarse filtration, fine filtration, and bypass filtration, this multi-stage system achieves high filtration accuracy with minimal flow loss, while also extending the filter element’s lifespan. These filters are arranged either in parallel or in series within the engine’s lubrication system.

Filtration Performance of Different Filter Materials

Once installed, the oil filter operates continuously under high temperature and high pressure.

Traditional filter media made from cellulose or glass fibers can no longer meet the demands of long-term, high-intensity filtration. They are prone to breakage, losing their filtering function, or even decomposing and shedding particles that enter the lubrication system.

Whether the filter paper ruptures or decomposes, lubrication failure is inevitable, leading to wear on engine components. Therefore, new synthetic fiber filter media have emerged to address these challenges.

● Synthetic Fiber Technology — 50 Times Finer Than a Human Hair

KOMAI, a well-known filter manufacturer introducing advanced international technology to China, utilizes SaraPore filter media in its oil filters. This material is composed of multiple layers of bonded synthetic fibers, with filtration pores as small as 1–10 microns, making it 50 times finer than a human hair.

SaraPore Multi-Layer Progressive Filtration

Using a multi-layer bonded and progressively structured design, SaraPore filter media offers excellent dust-holding capacity. While maintaining both high filtration precision and long service life, SaraPore also provides low flow resistance and high filtration efficiency, ensuring stable and efficient engine protection.

In addition, the SaraPore filter media is water-resistant, providing superior oil-water separation efficiency and preventing both free and emulsified water in the fuel system from causing corrosion.

● Extended Replacement Cycle – Preventing Filter Media Decomposition and Migration

The biggest drawback of cellulose-based filter media is the risk of media migration — during use, parts of the filter paper can break down and detach, allowing these particles to enter the engine’s lubrication system.

Each layer of SaraPore filter media is made from continuously bonded ultra-fine synthetic fibers. This material is thinner than traditional cellulose media and requires no additional supporting materials, effectively eliminating media migration issues while offering a higher dust-holding capacity.

Air Filter Products – 30% Increase in Filtration Area

For air filter products, KOMAI also showcases its core expertise. The KOMAI air filter features an Optiair Lite filter element structure, which uses a radial sealing design. Compared with traditional sealing methods, it increases the filtration area by 30%, effectively reducing air resistance and extending service life.

From ordinary filter paper to glass fiber media and now to synthetic fiber materials, each technological advancement has driven significant improvements in truck performance. These innovations allow for longer maintenance intervals, reducing the need for frequent service visits — so drivers can spend more time on the road and less time on maintenance.